it's the work of a couple of local graffiti artists, steve and tim. they say they had to use rock climbing gear to complete the 30-foot masterpiece. >>> and it was rhino versus ravens at the san francisco zoo today. everybody getting in the and the. guess who won. zoo keepers built their black rhino's breakfast in baltimore's image. they also spelled out go 9ers in carrots. boone, who is named for 49ers tackle alex the rhino boone, actually tackled the carrots first but probably just because he liked what they had to say. >>> stay with cbs 5 right through game time on sunday. our team of reporters sports director dennis o'donnell, vern glenn, michelle griego and mike sugerman will continue to bring us live reports from the big easy. mike sugerman is closing in on the crescent city tonight. he will be live on the road to the dome in about 10 minutes. >>> coming up a massive explosion rocks mexico city. the problem-plagued site that's left dozens hurt and damage for blocks. >> high-flying high-tech equipment to study the bay area's smoggy skies. who is